- Patch #1013864 by agentrickard, JimmyAx: book navigation block fails with Node Access modules.

modules/book/book.module

@@ -279,10 +279,10 @@ function book_block_view($delta = '') {
   }
   elseif ($current_bid) {
     // Only display this block when the user is browsing a book.
-    $select = db_select('node');
-    $select->addField('node', 'title');
-    $select->condition('nid', $node->book['bid']);
-    $select->addTag('node_access');
+  $select = db_select('node', 'n')
+    ->fields('n', array('title'))
+    ->condition('nid', $node->book['bid'])
+    ->addTag('node_access');
     $title = $select->execute()->fetchField();
     // Only show the block if the user has view access for the top-level node.
     if ($title) {